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Subnet Calculator

It calculates Network address and Broadcast address, Default gateway, First and Last usablle mask adress - based on an IP address and a Subnet Mask.


  Enter your values
 IP Address - Enter here your IP adress
 Subnet Mask - Enter here your Subnet Mask
 Ethernet Address - Ethernet adress (route to your subnet)
 First Usable Adress - By defaul this is a Gateway. Must be specified in TCP/IP
 Last Usable Adress - This is your last IP adress, possible gateway: depends on ISP
 Broadcast Adress - Broadcast IP - please don't use this one in TCP/IP


 
 

  IP Ranges Reserved for Internal Use (Private Networks) :
  Starting IP Address Ending IP Address Subnet Mask
Class A 10.0.0.0 10.255.255.255 255.0.0.0
Class B 172.16.0.0 172.31.255.255 255.255.0.0
Class C 192.168.0.0 192.168.255.255 255.255.255.0

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